#include <stdio.h>
void main()
{
    int n1,nm,i,j,flag,count=0;
    do
    {
        printf("Input START and END=?");
        scanf("%d%d",&n1,&nm);
    } while (!(n1>0&&n1<nm));
    printf("------------------PRIME TABLE(%d--%d)---------------------\n",n1,nm);
    if(n1==1||n1==2)
    {
        printf("%4d",2);
        n1=3;
        count++;
    }
    for(i=n1;i<nm;i++)
    {
        if(!(i%2))
            continue;
        for(flag=1,j=3;flag&&j<i/2;j+=2)
            if(!(i%j))
                flag=0;
        if(flag)
            printf(++count%15?"%4d":"%4d\n",i);
    }
    printf("\n");
}